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ICS551 Datasheet
1 TO 4 CLOCK BUFFER

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1 TO 4 CLOCK BUFFER
DATASHEET
ICS551
Description
The ICS551 is a low cost, high-speed single input to
four output clock buffer. Part of IDT’s ClockBlocksTM
family, this is our lowest cost, small clock buffer.
See the ICS552-02B for monolithic dual version of the
ICS551 in a 20 pin QSOP.
IDT makes many non-PLL and PLL based low skew
output devices as well as Zero Delay Buffers to
synchronize clocks. Contact IDT for all of your clocking
needs.
Features
Low skew (250 ps) outputs
Pb-free packaging
Low cost clock buffer
Packaged in 8-pin SOIC
Input/Output clock frequency up to 160 MHz
Non-inverting output clock
Ideal for networking clocks
Operating Voltages of 3.3 and 5.0 V
Output Enable mode tri-states outputs
Advanced, low power CMOS process
Commercial and industrial temperature versions
Block Diagram
ICLK
Q1
Q2
Q3
Q4
Output Enable
IDT™ 1 TO 4 CLOCK BUFFER
1
ICS551
REV P 051310

ICS551 Datasheet
1 TO 4 CLOCK BUFFER

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ICS551
1 TO 4 CLOCK BUFFER
Pin Assignment
ICLK
Q1
Q2
Q3
1
2
3
4
8 OE
7 VDD
6 GND
5 Q4
8 Pin (150 mil) SOIC
FAN OUT BUFFER
Pin Descriptions
Pin
Number
1
2
3
4
5
6
7
8
Pin
Name
ICLK
Q1
Q2
Q3
Q4
GND
VDD
OE
Pin
Type
Pin Description
Input Clock input. Internal pull-up resistor.
Output Clock output 1.
Output Clock output 2.
Output Clock output 3.
Output Clock output 4.
Power Connect to ground.
Power Connect to 3.3 V or 5.0 V.
Input Output Enable. Tri-states outputs when low. Internal pull-up resistor.
External Components
A minimum number of external components are required for proper operation. A decoupling capacitor of
0.01 µF should be connected between VDD on pin 7 and GND on pin 6, as close to the device as possible.
A 33series terminating resistor may be used on each clock output if the trace is longer than 1 inch.
IDT™ 1 TO 4 CLOCK BUFFER
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ICS551
REV P 051310

ICS551 Datasheet
1 TO 4 CLOCK BUFFER

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ICS551 pdf
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ICS551
1 TO 4 CLOCK BUFFER
FAN OUT BUFFER
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the ICS551. These ratings, which
are standard values for IDT commercially rated parts, are stress ratings only. Functional operation of the
device at these or any other conditions above those indicated in the operational sections of the
specifications is not implied. Exposure to absolute maximum rating conditions for extended periods can
affect product reliability. Electrical parameters are guaranteed only over the recommended operating
temperature range.
Item
Supply Voltage, VDD
All Inputs and Outputs
Ambient Operating Temperature, Commercial
Ambient Operating Temperature, Industrial
Storage Temperature
Junction Temperature
Soldering Temperature
Rating
7V
-0.5 V to VDD+0.5 V
0 to +70° C
-40 to +85° C
-65 to +150° C
125° C
260° C
Recommended Operation Conditions
Parameter
Ambient Operating Temperature
Power Supply Voltage (measured in respect to GND)
Min.
-40
+3.0
Typ.
Max.
+85
+5.5
Units
°C
V
IDT™ 1 TO 4 CLOCK BUFFER
3
ICS551
REV P 051310


ICS551 datasheets pdf
Total : 9 Pages
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